I'm not sure I get the point (other than saying something mildly controversial to attract attention to his company).

I've never watched them but I'm fairly sure there's videos of people sleeping in Teslas that are driving themselves. Possibly recorded by police cars about to arrest them.

And you'll say, yeah well that was only for x distance and in y circumstances.

But then we're just back to arguing again, which this was supposed to circumvent.

A delivery truck that could let the driver sleep on long roads between cities seems like it would be big, even if the driver had to wake up to do some tricky bits at either end. Of course then you can replace the sleeping driver with two drivers at each end of the journey and slash costs even more.